皮皮学，免费搜题
登录
搜题
【简答题】
采用简单随机重复抽样的方法在 2000 件产品中抽查 200 件,其中合格品 190 件,要求: ( 1 )计算样本合格品率及其抽样平均误差; ( 2 )以 95.45% 的概率保证程度对该批产品合格品率和合格品数量进行区间估计; ( 3 )如果极限误差为 2.31% ,则其概率保证程度是多少?
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】患者女性,45岁,右眼流泪2年,检查:泪囊区稍隆起,压迫泪囊后有白色粘稠液体自下泪小点流出,最 可能的诊断为?
A.
泪囊肿瘤
B.
急性泪囊炎
C.
慢性泪囊炎
D.
鼻泪管堵塞
E.
鼻泪管狭窄
【单选题】患者女性,45岁,右眼流泪2年,检查显示泪囊区隆起,压迫泪囊区有白色粘稠液体自下泪小点流出,最可能的诊断是
A.
泪囊肿瘤
B.
急性泪囊炎
C.
慢性泪囊炎
D.
鼻泪管堵塞
E.
鼻泪管狭窄
【单选题】Doctor:_________Patient: I've caught a bad cold and got a sour throat.
A.
Do you have anything to declare, sir?
B.
Good morning. May I help you?
C.
How have you been getting along recently?
D.
What seems to be the problem?
【单选题】Doctor: ______. Patient: I've caught a bad cold and got a sore throat.
A.
Do you have anything to declare, sir?
B.
Good morning. May I help you?
C.
How have you been getting along recently?
D.
What seems to be the problem?
【单选题】Would you please keep silent? The weather repor
A.
27 ． Would you please keep silent? The weather report and _________Iwant to listen. A. is broadcast
B.
is being broadcast
C.
has been broadcast
D.
had been broadcast
【单选题】患者、 女性, 45岁, 右眼流泪 2年, 泪囊区稍肿起, 压迫囊有脓液自下泪点流出, 诊断为: ( )
A.
急性泪囊炎
B.
慢性泪囊炎
C.
泪囊囊肿
D.
泪囊肿瘤
E.
泪道狭窄
相关题目：